VincentP :
There is no problem using an Nvidia GPU with an AMD processor.
The GTX 650 Ti boost is a better card than the HD 7790.
http://www.tomshardware.com/reviews/geforce-gtx-650-ti-boost-gk106-benchmark,3463-6.html
Yeah GTX 650Ti
Boost is a better card than HD 7790, but he asked for the
Non-Boost edition. The normal GTX 650Ti and HD 7790 have almost similar performance, on the contrary HD 7790 has lower power consumption so I recommended him HD 7790 previously. However, there is a good deal (well within @Kuldip195's budget) available online for a branded GTX 650 Ti so I recommended him to go for that in my next post.